import java.sql.*;
import java.util.Scanner;

public class Hello {
    public static void main(String[] args) {
        Connection connection=null;
        PreparedStatement preparedStatement=null;
        ResultSet resultSet=null;
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");
            String url="jdbc:mysql://127.0.0.1:3306/jdbc1?characterEncoding=utf-8";
            try {
                connection = DriverManager.getConnection(url, "root", "130258");
//                if(connection !=null){
//                    System.out.println("链接成功");
//                }
                String sql="select *from user";
                preparedStatement = connection.prepareStatement(sql);
             resultSet = preparedStatement.executeQuery();
                while(resultSet.next()){
                    int id = resultSet.getInt(1);
                    String name = resultSet.getString(2);
                    String pass= resultSet.getString(3);
                    System.out.println(id+"----"+name+"----"+pass);
                }



            } catch (SQLException e) {
                throw new RuntimeException(e);
            }
        } catch (ClassNotFoundException e) {
            throw new RuntimeException(e);
        }finally {
            try {
                if(resultSet!=null){
                    resultSet.close();
                }
                if(preparedStatement!=null){
                    preparedStatement.close();
                }
                if(connection!=null){
                    connection.close();
                }
            } catch (SQLException e) {
                throw new RuntimeException(e);
            }

        }

    }
}
